Time goes fast!
We finished the system. I can proudly say I'm now an Electronics Engineer! Yey!
Final specs:
-8 analog channels at 1kHz (of which one is wired to battery voltage, and another one has a pullup for RTD measurement)
-4 digital channels at 100Hz
-2 acce at 100Hz
-1 gyro at 100Hz
-GPS at 200Hz
-2 fully protected low side (5A max) programmable outputs
-SD Card with FAT file system
-5V regulated output
Of course it still lacks lot's of stuff! It doesn't plot vs. distance and still needs some more time in the UserInterface development. But the Hardware/Firmware is really solid, so that's nice!
The UserInterface can use simple lookup tables to plot from 0-5V to whatever you want. It's done with a graphic style window, but it's still limited to a first degree polynomial (which suffices for most needs).
The PCB prototype was completely hand-made, and the case was 3D printed.
I hope you like it.
From the screen, most of the analog channels in the dashboard are missing.
We've received a couple of offers. For the moment we're planning on a test to see how it behaves against a Motec system. Some are skeptical, but we're assured of what we've done. The test will be done on a Turismo Nacional Clase 3 car at the Autodromo de La Plata, date to be confirmed.
Both systems will be tested at the same time, connecting the analog channels of both in parallel, but using different gyro, acce and GPS.
Bye!
Caito.